Signature Application Dependencies Frontend Dependencies React 16.0.1 - Core UI library React DOM 16.0.1 - DOM manipulation node-forge 0.10.0 - Cryptographic operations axios 0.19.2 - HTTP client TypeScript 4.x - Type safety and developer experience signature_pad 4.x - Signature canvas functionality Testing Libraries: @testing-library/react - React component testing @testing-library/jest-dom - DOM testing utilities @testing-library/user-event - User event simulation Backend Dependencies (Go) aws-lambda-go - AWS Lambda runtime aws-sdk-go - AWS SDK for Go dgrijalva/jwt-go v3.2.0 - JWT authentication google/uuid - UUID generation stretchr/testify - Testing utilities gorilla/mux - HTTP routing Installation Frontend npm install Backend cd submitImage go mod download